Charles william krohne and henry frederick sesemann



(No Model.)

C. W. KROHNE 8u H. 1:". SESEMANN.

INHALER.

Patented Nov. 18, 1890.

www Maz/mw yg/@jid UNITED STATES PATENT OEEICE.

CHARLES VILLIAM KROHNE AND HENRY FREDERICK SESEMANN, OF LONDON, ENGLAND.

INHALER.

SPECIFICATION forming part of Letters Patent No. 440,713, dated November18, 1890.Y

' I `Application filed September 8, 1890. Serial No. 364,368. (Nomodel.)

.To a/ZZ whom t may concern:

Be itknown that we, CHARLES IVILLIAM KROHNE and HENRY FREDERICKSEsEnANN, su rgical-instrument manufacturers, of 8 Duke Street,Manchester Square, London, subjects of the Queen of Great Britain andIreland, have invented Improvements in Inhalers for the Administrationof Chloroform and other Anaesthetics, of which the following is aspecification.

Our invention relates to improvements in inhalers for the administrationof chloroform and other anzesthetics and it consists, chiey, of a deviceor respiration-indicator applicable to all kinds of inhalers, andcapable of indicating the nature, frequency, and character of therespirations of persons or animals subjected to the influence ofanzesthetics, so that, owing to the respiration being thus underconstant observation, all danger of syncope, coma, or other failure ofthe hearts action, due to a prolonged influence of the drugadministered, is removed, as immediately any abnormal sign is indicatedby certain premonitory symptons affecting the respiration, or by aslowing or entire stoppage of the latter, the apparatus can be forthwithwithdrawn from the persons or animals mouth and artificial respirationorother recuperative means resorted to in time to avoid accident. It isa wellknown fact that physicians have for years endeavored to minimizeby every conceivable appliance or process the danger arising from theuse of anaesthetics and of chloroform in particular; but their effortshave hitherto proved fruitless, owing to their not having been able tokeep the respiration of the patient under constant observation, so as toapply remedial measures in time-that is to say, before death supervenes;and in order that our invention may be more fully understood we haveshown the same in the accompanying sheet of illustrative drawings, inwhich- Figure l. is a side view of an inhaler provided with our improveddevice, showingthe mouth-piece in section. Fig. 2 is a plan of the same.Fig. 3 is a sectional elevation of our device applied to a special formof in haler. Figli is a plan of the latter. Fig. 5 is aview of the upperpart of the device. Fig. G is a section of the cap or cover which isused to protect the device from injury.

Our improved device consists of a truncated cone C, the upper andconical part c of which is provided at its base with two symmetricalslots, one of which (the slot s) is only shown in the drawings. Thisconical part c terminates in the cylindrical part P, the upper end ofwhich forms a rim o', projecting above the former. This cylindrical partF,which is inserted within the opening of the mouth-piece or bag M,carries a pipe p, passing through the latter, and through which theanzesthetic is inhaled, this pipe being fixed in the application shownin Fig. l to one of the side ribs ct a of the said mouthpiece, which isperforatedv `at the top to allow for the entrance of the anaestheticinto the mouth-piece or bag M. These ribs are secured to the frame f ofthe mouth-piece, as clearly shown in Fig.1. Fig. 3 shows the cylindricalpart I)l fixed directly to the neck of an improved inhaler of peculiarshape, which we prefer to the ordinary form, as shown in Fig. 1.

Our improved device consists, further, of a ring R, fitting over theconical part c and resting upon the rim 1^. Two screws u n', projectingthrough the slots s s', enable the ring to be turned to and fro for thepurpose of adjustment, as hereinafter more fully referred to. This ringis furnished with a slot t, in which moves a small holder h, carrying afeather F, and swiveled to the small tubes t t', partly countersunk inthe said ring. yThe cap shown in Fig.` 6 serves to cover the device whennot required for use. Instead of a feather, we may likewise use anyother light substance, material, or fabric. The inhaling apparatusbeingplaced over the patients mouth and chloroform vapor, for instance, beingadmitted through the pipe p, the respiration and expirations of the saidpatient will cause the feather F to move to and fro and in a manner andspeed corresponding to the way in which the respiration is carried on.As this feather which rests on the apex of the tapered part c is verysensitive, accurate indications will be constantly obtainable as to thenature, frequency, and character of such respiration. Should the head ofthe patient fall to 'one side, the ring R can be turned in the otherdirec- IOC) tion, so that the feather may always remain Straight infront of the operator administering the anaasthetio. The opening of thetapered part callows of the admixture of a sufficient amount of air withthe chloroform.

Our improved device can be likewise applied to a suitable bag for thepurpose of administering anaesthetics to animals-such as horses, cattle,sheep, zc-and will be found particularly useful to avoid pain incastrating and other operations. Our improved respiration-indicator maybe made of any suitable material, such as metal, horn, ivory, Celluloid,vulcanite, andthe like.

What We claim, and desire to secure loy Letters Patent of the UnitedStates, is-

In respiration-indicators used in connection with the administration ofanaesthetics, the combination of a truncated cone C, with a ring R and aswiveled feather F, substantially as hereinbefore described in thisspecification, and illustrated by the accompanying drawings.

In Witness whereof We have hereunto seb our hands in presence of twoWitnesses.

Signed at London this 26th day of- July, 1890.

CHARLES WILLIAM KRGHNE. HENRY FREDERICK SESEMANN. In presence ofn AERNEST WILLIAM BROOKE, ALBERT EDWARD ELLEN.

